Day/night diurnal temperature difference 0.152749 Temperature during the hottest quarter 0.264481 Compound topographic index (relative wetness) 0.450502 Elevation 0.711604 Nitrogen content of soil 0.738144 Precipitation during the wettest quarter 0.767646 Carbon content of soil 0.810367 Precipitation during the driest quarter 1.02492 Integer number of consecutive months where Tavg >= 5 deg C (Length of potential growing season) 1.04607 Precipitation during the hottest quarter 1.30782 Precipitation during the coldest quarter 1.31809 Ratio of precipitation to potential evapotranspiration 1.39973 Solar interception 1.41369 Bulk density of soil 1.501 Sum of monthly Tavg where Tavg >=5 deg C 1.78595 Available water holding capacity of soil 1.89599 Temperature during the coldest quarter 2.04304